After completing 8 courses of the study drug combinations, you will begin maintenance chemotherapy plus TKI (imatinib or dasatinib if you have Ph+ disease; or dasatinib or ruxolitinib if you have Ph-like disease). Maintenance chemotherapy will be given for a total of 24 months, and will be interrupted by 2 periods of intensive chemotherapy courses and the TKI at 6 and 13 months from the start of maintenance. You will continue receiving the TKI every day from that point on, unless intolerable side effects occur.